<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>分片示例</title>
</head>
<body>
    <input type="file" id="fileInput" />
    <button onclick="startUpload()">开始上传</button>

    <script>
        async function startUpload() {
            const fileInput = document.getElementById('fileInput');
            const file = fileInput.files[0];
            if (!file) {
                alert("请选择文件");
                return;
            }

            const filename = file.name;
            let start = 0;

            uploadFile(file, start);
        }

        async function uploadFile(file, start) {
            const chunkSize = 1024 * 1024; // 每个分片1MB
            const total = Math.ceil(file.size / chunkSize);

            for (let i = 0; i < total; i++) {
                const chunkStart = start + i * chunkSize;
                const chunkEnd = Math.min(chunkStart + chunkSize, file.size);
                const chunk = file.slice(chunkStart, chunkEnd);

                const formData = new FormData();
                formData.append('file', chunk);
                formData.append('start', chunkStart);
                formData.append('fileName', file.name);

                const response = await fetch('/file/upload2', {
                    method: 'POST',
                    body: formData
                });

                const result = await response.text();
                if (response.ok) {
                    console.log(`分片 ${i + 1}/${total} 上传成功`);
                } else {
                    console.error(`分片 ${i + 1}/${total} 上传失败: ${result}`);
                    break;
                }
            }
        }
    </script>
</body>
</html>